I'm actually curious about this as well. Sure, it may not be quite as efficient as other CAIs....who knows... but won't removing the silencer reduce some of the turbulence inside the intake along with maybe getting a bit more air through the filter?
scrming..I can't remember, but didn't your stock intake tube experiment (removing the silencer) show some potential or am I dreaming that? lol
(EDIT: So I went and viewed scrming's thread on the above expirement, and at that time you achieved your best 0-60 run, so whether that was a coincidence or not...it surely didn't hurt!)
I guess I'm just not 100% convinced that the full CAI's are worth it or not. (and maybe this isn't either lol, but its around 100 bucks cheaper) Some with the CAIs claim they feel a difference while others say it didn't do much more than improve the looks...